package com.cenxi.util;

import java.util.Random;

/**
 * @Author cenxi
 * @Date 2023/9/6 17:25
 * @Version 1.0
 */
public class RandomUtils {
    /**
     * 生成随机用户名，数字和字母组成,
     */
    public static String getRandomNameStr(int length) {

        String val = "";
        Random random = new Random();

        //参数length，表示生成几位随机数
        for (int i = 0; i < length; i++) {

            String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
            //输出字母还是数字
            if ("char".equalsIgnoreCase(charOrNum)) {
                //输出是大写字母还是小写字母
                int temp = random.nextInt(2) % 2 == 0 ? 65 : 97;
                val += (char) (random.nextInt(26) + temp);
            } else if ("num".equalsIgnoreCase(charOrNum)) {
                val += String.valueOf(random.nextInt(10));
            }
        }
        return val;
    }

    /**
     * 生成随机验证码，数字组成,
     */
    public static String getRandomName(int length) {

        StringBuilder val = new StringBuilder();
        Random random = new Random();

        //参数length，表示生成几位随机数
        for (int i = 0; i < length; i++) {
            val.append(random.nextInt(10));
        }
        return val.toString();
    }
}
